RF Exposure Evaluation Report
Report No.: DNT240465R0757-1907
Date: April 24, 2024
1. General Information
1.1 Test Location
| Company: | Dongguan DN Testing Co., Ltd |
| Address: | No. 1, West Fourth Street, South Xinfa Road, Wusha Liwu, Chang an Town, Dongguan City, Guangdong P.R.China |
| Test engineer: | Wayne Lin |
1.2 General Description of EUT
| Manufacturer: | Shenzhen Jooan Technology Co., Ltd |
| Address of Manufacturer: | Building 101-3,5 and 6, No.8, Guixiang Community Square Road, Guanlan Street, Longhua District, Shenzhen, China |
| EUT Description: | Smart Camera |
| Test Model No.: | W10Z-U, W10-U |
| Additional Model(s): | 2BBQ4-W10Z-U |
| Chip Type: | SV6355 |
| Serial Number: | PR240456R0757 |
| Power Supply: | AC 100-240V, 50/60Hz |
| Trade Mark: | N/A |
| Hardware Version: | V1.0 |
| Software Version: | V1.0 |
| Sample Type: | Portable Device, Module, Mobile Device |
| Antenna Type: | External, Integrated |
| Antenna Gain: | 2.9dBi (Provided by applicant) |
Remark:
- All models are just color differences, motherboard, PCB circuit board, chip, electronic components, appearance is all the same.
- Since the above data and/or information is provided by the applicant, relevant results or conclusions of this report are only made for these data and/or information. DNT is not responsible for the authenticity, integrity and results of the data and information and/or the validity of the conclusion.
2. RF Exposure Evaluation
2.1 RF Exposure Compliance Requirement
2.1.1 Limits
| Frequency range (MHz) | Electric field strength (V/m) | Magnetic field strength (A/m) | Power density (mW/cm²) | Averaging time (minutes) | ||
|---|---|---|---|---|---|---|
| (A) Limits for Occupational/Controlled Exposures | (B) Limits for General Population/Uncontrolled Exposure | |||||
| 0.3-3.0 | 614 | 614 | 1.63 | 1.63 | *(100) | 6 |
| 3.0-30 | 1842/f | 824/f | 4.89/f | 2.19/f | *(900/f²) | 6 |
| 30-300 | 61.4 | 27.5 | 0.163 | 0.073 | 1.0 | 30 |
| 300-1500 | / | / | / | / | f/300 | 6 |
| 1500-100,000 | / | / | / | / | 5 | 6 |
| 1.34-30 | 824/f | 2.19/f | *(180/f²) | 30 | ||
| 300-1500 | / | / | f/1500 | 30 | ||
| 1500-100,000 | / | / | 1.0 | 30 | ||
Note:
- F=frequency in MHz
- *=Plane-wave equivalent power density
- RF exposure compliance will need to be determined with respect to 1.1307(c) and (d) of the FCC rules. The emissions should be within the limits at 300kHz in Table 1 of 1.1310 (use the 300kHz limits for 150kHz:614V/m,1.63A/m).
Friis Formula
Friis transmission formula: Pd = (Pout*G)/(4* Pi * R 2)
Where:
- Pd = power density in mW/cm²
- Pout = output power to antenna in mW
- G = gain of antenna in linear scale
- Pi = 3.1416
- R = distance between observation point and center of the radiator in cm
Pd is the limit of MPE, 1 mW/cm². If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached.
2.1.2 Test Procedure
Software provided by client enabled the EUT to transmit data at lowest, middle and highest channel individually.
2.1.3 EUT RF Exposure Evaluation
Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.0/2.0 in linear scale.
Output Power Into Antenna & RF Exposure Evaluation Distance:
This confirmed that the device comply with MPE limit.
| Test Mode | Antenna | Freq(MHz) | Power [dBm] | MAX Target power (dBm) | Target power (dBm) | Antenna gain (dBi) | Power Density (mW/cm²) | Limited Power Density (S) (mW/cm²) | Test Result | |
|---|---|---|---|---|---|---|---|---|---|---|
| 2.4G Band | ||||||||||
| BLE 1M | Ant1 | 2402 2440 2480 |
7.16 6.91 6.52 |
7±1 | 7.52 | 2.9 | 1.9498 | 0.0024 | 1 | Complies |
| BLE 2M | Ant1 | 2402 2440 2480 |
7.52 7.08 6.49 |
|||||||
| 11B | Ant1 | 2412 2437 2462 |
16.08 15.81 16.02 |
|||||||
| 11G | Ant1 | 2412 2437 2462 |
15.82 15.35 15.21 |
|||||||
| 11N20SISO | Ant1 | 2412 2437 2462 |
16.78 16.31 15.21 |
|||||||
| 11N40SISO | Ant1 | 2422 2437 2452 |
16.53 16.18 14.88 |
|||||||
| 11AX20SISO | Ant1 | 2412 2437 2462 |
17.58 16.82 15.73 |
17±1 | 17.58 | 2.9 | 1.950 | 0.0245 | 1 | Complies |
| 11AX40SISO | Ant1 | 2422 2437 2452 |
16.92 16.88 15.57 |
|||||||
